Severe

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northwest Arizona, including the following areas, Hualapai Mountains, Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side, Northwest Deserts and Northwest Plateau, southeast California, including the following areas, Cadiz Basin, Eastern Mojave Desert, Morongo Basin and San Bernardino County-Upper Colorado River Valley, and Nevada, including the

* WHAT...Heavy snow and blowing snow possible. Total snow accumulations up to or greater than 12 inches possible. Winds could gust as high as 35 mph. * WHERE...Absaroka/Beartooth Mountains and Crazy Mountains. * WHEN...From Saturday evening through Monday morning. * IMPACTS...Travel could be very difficult to impossible over the Beartooth Pass, and in and around Cooke City. Recreation in the back country will be impacted. * ADDITIONAL DETAILS... Monitor the latest forecasts for updates on this situation.

* WHAT...Dangerously hot conditions with high temperatures near 110 degrees and overnight lows between 80 and 85 degrees. This will yield at least major Heat Risk, impacting anyone without adequate cooling and hydration. For the Wind Advisory, south winds 25 to 35 mph with gusts up to 60 mph expected. * WHERE...Elevations in Death Valley National Park below 2000 feet. * WHEN...For the Extreme Heat Warning, until 8 PM PDT this evening. For the Wind Advisory, from 2 PM Saturday to 5 AM PDT Monday.

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central Alabama, including the following counties, Autauga, Barbour, Bibb, Blount, Bullock, Calhoun, Chambers, Cherokee, Chilton, Clay, Cleburne, Coosa, Dallas, Elmore, Etowah, Fayette, Greene, Hale, Jefferson, Lamar, Lee, Lowndes, Macon, Marengo, Marion, Montgomery, Perry, Pickens, Pike, Randolph, Russell, Shelby, St. Clair, Sumter, Talladega, Tallapoosa, Tuscaloosa, Walker and Winston.

* AFFECTED AREA...Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...West 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 15 percent. * TEMPERATURES...Up to 81. * IMPACTS... Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended. A Red Flag Warning means that critical fire weather conditions are

...The Flood Warning is extended for the following rivers in Florida... St. Marks River near Newport On Old Magnolia Rd affecting Wakulla and Leon Counties. * WHAT...Minor flooding is forecast. * WHERE...St. Marks River near Newport On Old Magnolia Rd. * WHEN...From Saturday afternoon until further notice. * IMPACTS...At 8.5 feet, Water approaches the steps to an elevated residence on Old Magnolia Road in Wakulla County. Other elevated structures begin to be surrounded by water. Portions of the Natural

* WHAT...Sub-freezing temperatures as low as 28 expected for Wallowa Valley. * WHERE...Wallowa County. * WHEN...From 1 AM to 10 AM PDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Central Oregon. * WHEN...From 1 AM to 10 AM PDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northeast Georgia, including the following counties, Elbert, Franklin, Habersham, Hart, Rabun and Stephens; portions of western North Carolina, including the following counties, Avery, Buncombe, Burke, Caldwell, Haywood, Henderson, Jackson, Macon, McDowell, Mitchell, Polk, Rutherford, Transylvania and Yancey; portions of Upstate South Carolina, including Oconee